Memory check

Hi everyone
Does anyone know of a utility i can download that will check the status of my RAM?
I am getting occasional Stop errors when booting up and after searching the net and the MS knowledge base, i think the RAM may be the culprit.
The errors are the usual Stop: 0x00000074, 03, 02, 00 and 14c.
If any one could help i would be very grateful

Yes I use memtest-x86. It's acctually part of a Linux dist (Mandrake) but it can be downloaded separately. I posted instructions on downloading and using it in this forum a while ago but I can't find it right now. Try searching.